Senders: National Geographic Soc.
- Willis L. Moore for National Geographic Soc. to SLC, 27 November 1908 · Washington, D.C. · UCLC38324 CU-MARK
- O. P. Austin for National Geographic Soc. to SLC, 5 March 1909 · Washington, D.C. · UCLC40129 CU-MARK
- O. P. Austin for National Geographic Soc. to SLC, 2 April 1909 · Washington, D.C. · UCLC40194 CU-MARK
1